Remove unreferenced local variable which breaks build.

src/processor/minidump.cc

 // Copyright (c) 2010 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 1912 matching lines @@
     } else if (cv_record_signature_ == MD_CVINFOPDB20_SIGNATURE) {
       // It's actually an MDCVInfoPDB20 structure.
       const MDCVInfoPDB20* cv_record_20 =
           reinterpret_cast<const MDCVInfoPDB20*>(&(*cv_record_)[0]);
       assert(cv_record_20->cv_header.signature == MD_CVINFOPDB20_SIGNATURE);
 
       // GetCVRecord guarantees pdb_file_name is null-terminated.
       file = reinterpret_cast<const char*>(cv_record_20->pdb_file_name);
     } else if (cv_record_signature_ == MD_CVINFOELF_SIGNATURE) {
       // It's actually an MDCVInfoELF structure.
-      const MDCVInfoELF* cv_record_elf =
-          reinterpret_cast<const MDCVInfoELF*>(&(*cv_record_)[0]);
-      assert(cv_record_elf->cv_signature == MD_CVINFOELF_SIGNATURE);
+      assert(reinterpret_cast<const MDCVInfoELF*>(&(*cv_record_)[0])
+          ->cv_signature == MD_CVINFOELF_SIGNATURE);
 
       // For MDCVInfoELF, the debug file is the code file.
       file = *name_;
     }
 
     // If there's a CodeView record but it doesn't match a known signature,
     // try the miscellaneous record.
   }
 
   if (file.empty()) {
@@ skipping 2912 matching lines @@
     return NULL;
   }
 
   *stream = new_stream.release();
   info->stream = *stream;
   return *stream;
 }
 
 
 }  // namespace google_breakpad